This two-digit digital pressure gauge was found in the 1992 special edition of Radio Electronics Experimenter. A/D converter integrated circuits are uncommon today.
We found this circuit in an old Popular Electronics. The circuit is experimental, driving an LED...
This is a channel of a stereo amplifier and small power with the LM386 suggested by the Radio...
The purpose of this circuit found in a 1994 documentation is to drive a 24 V motor. The circuit...